Center-drain turntable



H. M." NORRIS. CENTER DRAIN TURNTABLE.

APPLICATION FILED APR- 2, 192K.

HENRY IVI. nonnrs, or cnvcrnnarrenro, assrenon TO THE CINCINNATIBICKFORD TOOL COIVIPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

CENTER-DRAIN TUR TABLE.

nazeaee.

T0 aZZ whom it may concern:

Be it known that I, HENRY M. Nonnrs, a citizen of the United States, andresiding at Cincinnati in the county of Hamilton and State of ImprovedCenter- Drain Turntable, of which the followingspecilication is a fulldisclosure.

This invention relates to work-tables, notably-for upright drills, andit deals more especially with an arrangement for disposing of either thecooling or abrading fluids used in certain machining operations;together with the small metal-chips resulting from the drillingoperation and which ordinarily accumulate on the table and especially inthe recesses thereof. In its more restricted aspect, the inventioncomprehends an arrangement of channels for conducting thesefluid-and-chip aggregates to a common point (on, in or through thetable), preferably 10 cated over and leading through one of thetable-supporting members. l I 7 -A type of drill table, which admirablylends itself to alteration to conform with this invention, is theconventional rotarytable having the usual radial T-slots for receivingthe work-clamping bolts. In this type of table, however, the T-slots arebarely of'sullicient depth to receive th ebolt-heads, and they terminateshort of any bore that may have been provided in the hub. The

hub, in this type of table, is generally located at the center of thetable and inmost cases iscast hollow to receive the drill. The presentinvention, through certain alter-a tions, utilizes these characteristics'of conventionaltables in fulfilling a major part of the requirements ofa drain-system; thereby creating a work-table having a highly ellioientdrain-system but without increasingits constructional CllffiCLlllJlQS toany appreciable extent, as comparedwith' cost of the usual rotary-table.

In applying this invention to conventional tables, the normal depth ofthe T-slotL-s is increased so that, in addition to serving their normalpurpose of accommodating the heads of the clamping-bolts, they will alsofunc} tion freely as conducting-channels ample to convey the aggregatesto a suitable point of deposit. In order that these collected fluids maybe disposed of, the channels are arranged freely to communicate directlywith the axial opening often provided 111 the hub Specification ofLetters Patent. Pafggnted Application filed April 2,

Ohio, have invented a new and 1921. Serial No, ember or, if such openingbe not present. a drainopenlng 1s especiallyprepared. The communicationbetween'th'e T-lslots and thebore of'thehub may be established byincreasing the length of the T-slots so that, at the Penter of the tablethey open into the vertical bore, or smallauxiliary channels mightcommunicate with theT-channels and the drainpassage. The fluid, which isdelivered onto the table, passes through the .T-slots to a common pointand is discharged intothis' opening in the hub.

Irrespective of whether the fluids are conducted to a common point bythe usual T- slots or by auxiliary channels, an arrange ment fordisposing of the fluids collected at this point forms an important phaseof thepresentinvention; This disposition of the rather copiousquantitiesoffluid ordinarily used in machining operationshas always presented adllicultproblem. In some instances, the disposal has been arranged forby drain-holes arranged at one" corner in the bottom of the table; theoutlet being screened to catch the chips. This. custom has, however,been attended with more or less inconvenience; because of the diliicultyin causing the fluids to flow to this single Aug. 2 2, 1922.

opening, and because of an interference with the free-flow of fluidcaused by a clogging of the screen by the chips. The ordinary cornerdrain-hole is also objectionable because but two alternativesfor thedisposal of fluids present themselves either the fluid is-allowed todrip. onto. the floor or onto the base ofthe machine (depending on thetype of machine with which thetable .is'usedyor it'mustbe conducted awayby a conduit connected to the opening. Either method of disposing ofthefiuids is'inherently objectionable; the dripping-method, because/ofthe loss of the oiland danger to the operators caused by slippery'floor's, and the con duit-method, because the table is prevented from.rotating freely and completely.

The present invention is therefore particularly applicable to therotating type of drill-table.; since this form of table lends, itselfpeculiarly to the discharge of the oil at the center of the table(thereby obviating either the objectionable drip or conduitconnection)and also becausethe usual radiating T-slots of this type of table" maybe conveniently altered so as also to serve as chan nels for conductingthe fluids to the center of the table. The present invention, in itspreferred form, also involves a channel encircling the tableand arrangedsubjacent to the outer'ends or" the T-slots; thereby prowork to thetable.

viding an arrangement for collecting the fluid-chip aggregates whichspill from the portions of the table between the T-slots. Ordinarily,and in the specific embodiment of the invention shown in the drawings,these intervening portions lie in a single plane. It is to beunderstood, however, that the table might be cast with inclined portionsbetween the T-slots so. as to facilitate the shedding 01" thezfiuidimixtures into the encircling'cha'nnel and still leave ridged portionsdirectly adjacent to the channels to provide level radial ridges foraffording the necessary' level support. for the work.

fln the drawing, Fig. 1, is a plan view of the invention; Fig. 2 is aside elevation partly insection; Fig. 3 is a section of Fig. 1 on theline 33 and Fig. 1 is a section of Fig. 1 on the line lt.

Continuing now by way or a more detailed description, A denotes theplaten or drill-table proper and B denotes the standard for supportingor positioning the table. in this instance, this standard is representedas tubular in form; it being utilized as a'hub journaled in aconventional bracket (not shown) extending radially from the column of adrilling-machine in the usual manner, as will be understood. The bore ofthis hub, indicated by 1, extends vertically and may, if desired, openthrough the top ofthe platen so as to receive the drill and permit someof the chips therefrom to drop downwardly therethrough. In thisinstance, .a closed platen portionS is located in vertical registrywiththe bore 1. Near its upper end, the bore 1 flares .upwardly andoutwardly, as indicated by 2, and is preferably enlarged to form thedrain-chamber 4 which may be, between the radial ribs 11, extendedradially to the annular wall 9 which provides a reinforcement andsupport for the horizontal wall 8 of the platen proper. A flange 14Ldepends fromthe outer margin ofthe platen and, adjacent this flange, isa moat 13 circumscribing or extending around near the periphery oi thetable; the wall 12 constituting the inner annular wall of the moat.

Channel-like ribs .11 are cast integrally with the other parts ofthetable and hori- Zontally, .or nearly so, extend radially through orinto connection with the annular wall 9; these ribs Jbeing channeled asshown by Fig. 4 in the form of a T-slot providing an enlarged conduit 5of materially greater depth than the head of a bolt C such as isconventionally used for clamping The shank of this bolt isaccommodatedby means ofthe slot 6 as Having thus revealed this invention, I

claim as new and desire to secure the i01 lowing combinations ofelements, .or equivalents thereof, by Letters Patent of the UnitedStates I 1. A work-table comprehending individual. drain-passages havingthe shape of con ventional T-slots and converging toward-a common point;and a single downward (:lrain-passage located at said point, saiddrain-passage being enlarged at its upper end to communicate with theinner ends of said drain-passages and into which theymay discharge thefluids.

2. A work-table comprehendinga series of radial drain-passages 5converging toward a common point and a single vertical discharge passage1 at this point with, which the inner ends of said passages communicate, said drainepassages comprising narrow slots 6 for receiving theshanks of bolts and said slots 6 terminatin at Joints. 7:

located concentrically to the central axis oi the vertical drainpassage.

3.1-1 work-table comprehending an encircling channel andsubjacentinwardly-extending radiating drain-passages c0mmunicating attheir outer ends wit-h said chan-. nel and communicating at thelr innerends with adischarge opening centrally located in the table, saiddrain-passages being open to receive fluid throughout the greaterportion ottheir lengths from the top surface of said table and beingT-shaped to alsov receive work-retaining bolts.

1-. A rotary work-table comprehending a hub and a platen having anencirclingchannel; subjacent inwardly-extending. radiatingdrain-passages communicating at their outer ends with saidchannel toreceive fluidtherefrom and having their inner ends communicatingdirectly with a central drainpassage provided by said hub; the radiatingdrain-passages being adapted to receive the heads of bolts for clampingthe work.

5. A drill-table comprehending a horizontal top wall 8 having itsunder-side pro videdwith an annular table-supporting wall 2 spaced fromthe top-wall to form an enclosed central drain-chamber 4L; the undersideof said table being alsoprovided with a number 01"" channele :lribsextending to an annular wall 9 having openings communicating with thechannels provided by said ribs; and a tubular hub B integrally dependingfrom said annular Wall 2 and adapted to serve as a drain for saidchamber.

6. A drill-table comprehending a horizontal Wall bordered by a moat; theunderface of said Wall being integral with the funnel-like upper end ofa tubular hub like support; and a plurality ofopen conduits establishingcommunication between the said moat and the funnel-like upper end ofsaid support, said open conduits having the shape of conventionalbolt-retaining T-slots.

In Witness whereof, I hereunto subscribe 15 my name, as attested bythetwo subscribing Witnesses.

H. M. NORRIS.

